Alert archive / Louisiana / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 99
The Storm Prediction Center issued this severe thunderstorm watch at Mar 31, 2007, 8:40 AM CDT for 21 parishes in Louisiana; 5 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 31, 2007, 8:40 AM CDT (13:40 UTC)
- Expired
- Mar 31, 2007, 2:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 26 counties
Acadia Parish, LA, Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, Evangeline Parish, LA, Grant Parish, LA, Iberia Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, LaSalle Parish, LA, Natchitoches Parish, LA, Rapides Parish, LA, Sabine Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, St. Mary Parish, LA, Vermilion Parish, LA, Vernon Parish, LA, Winn Parish, LA, Jasper County, TX, Newton County, TX, Orange County, TX, Sabine County, TX, San Augustine County, TX
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 10%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
1 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 31, 8:41 AM CDT | Severe Thunderstorm Warning | LCH | Jefferson, Orange | 54 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 30, 10:06 PM CDT | Mesoscale Discussion | SPC | Bienville, Bossier, Caddo, Claiborne, De Soto, Natchitoches and 3 more | 84 min |
| Mar 30, 10:28 PM CDT | Severe Thunderstorm Watch | SPC | Bossier, Caddo | 8 hr |
| Mar 31, 2:40 AM CDT | Mesoscale Discussion | SPC | Bossier, Caddo | 95 min |
| Mar 31, 7:08 AM CDT | Mesoscale Discussion | SPC | Acadia, Calcasieu, Cameron, Jefferson Davis, Lafayette, Vermilion | 67 min |
| Mar 31, 11:03 AM CDT | Mesoscale Discussion | SPC | Morehouse, Union, West Carroll | 57 min |
| Mar 31, 12:08 PM CDT | Mesoscale Discussion | SPC | Ascension, Assumption, Avoyelles, Catahoula, Concordia, East Baton Rouge and 25 more | 97 min |
| Mar 30, 7:38 PM CDT | Mesoscale Discussion | SPC | Anderson, Atascosa, Bandera, Bastrop, Bell, Bexar and 74 more | 2 hr |
| Mar 30, 9:48 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bastrop, Bell, Bexar, Blanco and 49 more | 117 min |
| Mar 30, 11:53 PM CDT | Mesoscale Discussion | SPC | Anderson, Atascosa, Bandera, Bastrop, Bell, Bexar and 45 more | 67 min |
| Mar 31, 2:12 AM CDT | Mesoscale Discussion | SPC | Aransas, Atascosa, Austin, Bastrop, Bee, Brazoria and 32 more | 93 min |
| Mar 31, 3:17 AM CDT | Tornado Watch | SPC | Aransas, Austin, Bee, Brazoria, Calhoun, Chambers and 17 more | 7 hr |
| Mar 31, 5:30 AM CDT | Mesoscale Discussion | SPC | Aransas, Austin, Bee, Brazoria, Calhoun, Chambers and 16 more | 2 hr |
Nearby
Severe Thunderstorm Watches in Louisiana, 2007Severe Thunderstorm Watches in Texas, 2007Every severe thunderstorm watch in 2007
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.